Method for innocent treatment of surplus sludge after biochemical treatment of organic chemical waste water
A harmless treatment and excess sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problem that sludge is difficult to be effectively used and the ecological environment Adverse effects, high treatment costs, etc., to achieve the effect of changing properties, good fluidity, and reducing pollution
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[0031] Now take the calcium carbide slag pump forebay (carbide slag slurry storage tank) of the acetylene station as the digestion tank as an example, non-limiting examples are described as follows:
[0032] 1. Pump the treated sludge in the biochemical treatment tank together with the sewage into the sedimentation tank, let it stand still, and settle naturally by gravity. After clarification, remove the supernatant.
[0033] 2. Use a mud pump to pump the sludge with a moisture content of 98% at the bottom of the tank into the digestion tank (pump forebay). The calcium carbide slurry has a pH value of 12~14 and a solid content of 7%. Pump the sludge with a volume of 0.5‰ of the calcium carbide slurry. Sludge, put compressed air into the pump front tank for strong alkali digestion, pump it into the storage tank after digestion, continue to pass compressed air into the storage tank, and further force homogenization to make the digestion complete.
[0034] 3. Use a van plate and ...
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